forked from OSchip/llvm-project
71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// template<class R, class F>
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// transform_view(R&&, F) -> transform_view<views::all_t<R>, F>;
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#include <cassert>
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#include <concepts>
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#include <ranges>
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#include <utility>
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struct PlusOne {
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int operator()(int x) const;
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};
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struct View : std::ranges::view_base {
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int *begin() const;
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int *end() const;
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};
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struct Range {
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int *begin() const;
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int *end() const;
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};
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struct BorrowedRange {
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int *begin() const;
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int *end() const;
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};
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template<>
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inline constexpr bool std::ranges::enable_borrowed_range<BorrowedRange> = true;
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void testCTAD() {
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View v;
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Range r;
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BorrowedRange br;
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PlusOne f;
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static_assert(std::same_as<
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decltype(std::ranges::transform_view(v, f)),
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std::ranges::transform_view<View, PlusOne>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::transform_view(std::move(v), f)),
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std::ranges::transform_view<View, PlusOne>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::transform_view(r, f)),
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std::ranges::transform_view<std::ranges::ref_view<Range>, PlusOne>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::transform_view(std::move(r), f)),
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std::ranges::transform_view<std::ranges::owning_view<Range>, PlusOne>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::transform_view(br, f)),
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std::ranges::transform_view<std::ranges::ref_view<BorrowedRange>, PlusOne>
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>);
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static_assert(std::same_as<
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decltype(std::ranges::transform_view(std::move(br), f)),
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std::ranges::transform_view<std::ranges::owning_view<BorrowedRange>, PlusOne>
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>);
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}
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